22(хотя бы один из предыдущих процессов)

data = open('22 (4).csv').readlines()[1:]
n = len(data)
ids = {}
tt = [0] * n
prev = [[] for i in range(n)]
for i in range(n):
    ind, t, *args = data[i].split(';')[:-2]
    ind = int(ind)
    ids[ind] = i
    t = int(t)
    tt[i] = t
    for e in args:
        if e != '':
            x = ids[int(e.replace('"', ''))]
            prev[i].append(x)
answ = [0] * n
for i in range(n):
    if len(prev[i]) != 0:
        answ[i] = 1000000000000
        for lst in prev[i]:
            answ[i] = min(answ[i], answ[lst] + 3 + tt[i])
    else:
        answ[i] = tt[i]
print(max(answ))